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Encyclopedia > Tectum

The tectum is the dorsal part of the midbrain, derived in embryonic development from the alar plate of the neural tube. In adult humans it is present only in the mesencephalon (midbrain), as the inferior and the superior colliculi. In biological anatomy, the mesencephalon (or midbrain) is the middle of three vesicles that arise from the neural tube that forms the brain of developing animals. ... The neural tube is the embryonal structure that gives rise to the brain and spinal cord. ... In biological anatomy, the mesencephalon (or midbrain) is the middle of three vesicles that arise from the neural tube that forms the brain of developing animals. ... In biological anatomy, the mesencephalon (or midbrain) is the middle of three vesicles that arise from the neural tube that forms the brain of developing animals. ... The paired inferior colliculi together with the superior colliculi form the eminences of the corpora quadrigemina. ... The superior colliculus is part of the brain that sits below the thalamus and surrounds the pineal gland in the mesencephalon of vertebrate brains. ...


The superior colliculus is involved in preliminary visual processing, and control of eye movments. In non-mammalian vertebrates, it serves as the main visual area, functionally analogous to the visual areas of the cerebral cortex in mammals. Location of the Cerebral cortex Slice of the Cerebral cortex, ca. ...


The inferior colliculus is involved in auditory processing. It receives input from various brainstem nuclei and projects to the medial geniculate nucleus of the thalamus, which relays auditory information to the primary auditory cortex. The medial geniculate nucleus is a nucleus of the thalamus that acts as a relay for auditory information. ... The thalamus (from Greek thálamos = bedroom, chamber) is a part of the brain. ... The primary auditory cortex the region of the brain which is responsible for processing of auditory (sound) information. ...


Both colliculi also have descending projections to the reticular formation and spinal cord, and thus can be involved in responses to stimuli faster than cortical processing would allow.


External links

  • Interactive High Resolution Brain Atlases and Brain Maps

See also


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To guarantee the removal of the tectum, the entire cerebral aqueduct was exposed.
In contrast to the latter, HRP was found on left and right sides of the tectum among both albino and pigmented cyclopes and orthoclopes.
Thus, while a connection between the retina and the tectum appears to be a necessary condition for NP, based upon the tectectomy series, additional conditions must be satisfied for the animal to display NP behavior.
Tectum Inc. | accoutics and baffles (930 words)
The use of Tectum acoustical panels as hanging sound baffles is growing in popularity as the durability, paintability, ease of application in numerous situations and the need for their sound-absorbing qualities is recognized by acoustical engineers.
Tectum III panels are typically used in sloped applications where insulation and a nailable surface are required.
The Tectum E roof deck panel is a composite of a Tectum substrate EPS insulation and OSB board, which are bonded with code-listed structural adhesives.
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